ASTM C1072-05b
(Test Method)Standard Test Method for Measurement of Masonry Flexural Bond Strength
Standard Test Method for Measurement of Masonry Flexural Bond Strength
SCOPE
1.1 This test method covers the determination of flexural bond strength of nonreinforced masonry by physical testing of each joint of masonry prisms.
1.2This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C1072–05b
Standard Test Method for
1
Measurement of Masonry Flexural Bond Strength
This standard is issued under the fixed designation C 1072; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* of flexural bond strength. It may be used either on specimens
especially fabricated for bond strength evaluation or on speci-
1.1 This test method covers the determination of flexural
mens cut from existing masonry.
bond strength of nonreinforced masonry by physical testing of
3.2 The bond strengths determined from this test method
each joint of masonry prisms.
can be used as a means of evaluating the compatibility of
1.2 This standard does not purport to address all of the
mortars and masonry units. It may also be used to determine
safety concerns, if any, associated with its use. It is the
the effect on flexural bond strength of such factors as masonry
responsibility of the user of this standard to establish appro-
unit and mortar properties, workmanship, curing conditions,
priate safety and health practices and determine the applica-
coatings on masonry units, or any other factors that may be of
bility of regulatory limitations prior to use.
concern.
2. Referenced Documents
3.3 Flexural bond strength determined by this test method
2
should not be interpreted as the flexural bond strength of a wall
2.1 ASTM Standards:
constructed of the same material. However, results may be
C67 Test Methods of Sampling and Testing Brick and
used to predict the flexural strength of a wall. Nor should it be
Structural Clay Tile
interpreted as an indication of extent of bond for purposes of
C 140 Test Methods of Sampling and Testing Concrete
water permeance evaluation.
Masonry Units
C 270 Specification for Mortar for Unit Masonry
4. Apparatus
C 780 Test Method for Preconstruction and Construction
4.1 The test apparatus is shown in Figs. 1-4. The upper and
Evaluation of Mortars for Plain and Reinforced Unit
lower clamping mechanisms shall be constructed as shown,
Masonry
except that the hex head bolts are permitted to be replaced by
C 1357 Test Methods for Evaluating Masonry Bond
other tightening devices of equal, or greater, strength and
Strength
stiffness. The support frame shall be constructed as shown or
C 1532 Practice for Selection, Removal, and Shipment of
shall be constructed using configurations and materials of
Masonry Assemblage Specimens from Existing Construc-
equal, or greater, strength and stiffness. The testing apparatus
tion
shall be constructed to apply the load vertically downward on
3. Significance and Use
the upper clamping system in such a manner that the upper and
lower clamp do not come in contact during the tests.The prism
3.1 This test method is intended to provide a simple and
support system shall be able to accommodate the size of the
economical means for the determination of comparative values
prism to be tested.
1
5. Sampling and Testing
This test method is under the jurisdiction of ASTM Committee C15 on
Manufactured Masonry Units and is the direct responsibility of Subcommittee
5.1 Brick Masonry Units—Representative brick masonry
C15.04 on Research.
units shall be sampled and tested in accordance with Test
Current edition approved Nov. 15, 2005. Published December 2005. Originally
MethodsC67.
approved in 1993. Last previous edition approved in 2005 as C 1072–05a.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
NOTE 1—Brick properties for which there are methods of test in Test
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
MethodsC67 that may be of interest are cold-water absorption, boiling-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. water absorption, initial rate of absorption, and compressive strength.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
C1072–05b
FIG. 1 Bond Wrench Testing Apparatus
5.2 Concrete Masonry Units—Representative concrete ma- 6.3.1.3 Immediately place the next course on the mortar bed
sonry units shall be sampled and tested in accordance withTest and tap it to proper level and joint thickness. One face of each
Methods C 140. prism shall be in a nearly true plane.
5.3 Mortar—When mortar property testing is specified, the 6.3.1.4 Repeat 6.3.1.2 and 6.3.1.3 until the prisms are the
c
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.